I am not very good with WordPress, but I think it may have something to do with this file
body class="home page page-id-19 page-template page-template-homepage-php"
when I set the width in css of body to 80% the scroll bar disappeared.
Wow! I ran to the store and came back and their were several replies already. Thanks everyone for the input. The suggests help me get focused again. It turns out that it was the footer that was missing a width value and thus causing the page to be too wide. The nav in turn was just expanding into the available space.